Medicare Coverage for Cancer: What Parts A, B, C and D Pay
Medicare covers a wide range of cancer care: hospital stays, doctor visits, chemotherapy, radiation, surgery and many prescription drugs. What you pay depends on the type of care, where you get it, and which kind of Medicare you have. Medicare’s own cancer publication and the American Cancer Society both describe it that way. This guide walks through each part, the costs that can add up, and the things Medicare doesn’t pay for.
TL;DR
- Part A covers cancer care you get as a hospital inpatient. Part B covers most outpatient care, such as doctor visits, many chemotherapy drugs and radiation. Part D covers most prescription drugs, including oral chemo and anti-nausea drugs.
- With Original Medicare, you usually pay 20% of the Medicare-approved amount for Part B services after the deductible, with no yearly out-of-pocket limit unless you add supplemental coverage.
- Medicare Advantage plans must cover what Original Medicare covers, but they can add networks, referrals and prior authorization.
- Medicare generally does not cover long-term nursing home care, assisted living room and board, transportation to treatment or lodging.
- Before you start treatment, confirm that your drug is on your plan’s formulary and that your providers take your plan.
Table of Contents
- How Original Medicare covers cancer treatment
- What you may still pay with Original Medicare
- Cancer coverage under Medicare Advantage
- Cost comparison at a glance
- What Medicare doesn’t cover
- How to check your own coverage before treatment
- Choosing or changing a plan when you have a cancer diagnosis
- How Almond Insurance can help
- FAQ
- Sources
How Original Medicare covers cancer treatment
Original Medicare is Part A (hospital insurance) and Part B (medical insurance). Which one pays depends mostly on where you receive care.
Part A: care in the hospital
Part A covers cancer treatment you receive as an inpatient. According to Medicare’s cancer coverage publication, it also covers:
- Skilled nursing facility care after a qualifying 3-day hospital stay
- Home health care
- Blood
- Some clinical research costs while you’re an inpatient
- Surgically implanted breast prostheses after a mastectomy done as an inpatient
- Hospice care
Part B: outpatient care
Most people spend much of their treatment as outpatients, so Part B does a lot of the work. The same Medicare publication lists these Part B services when they are medically necessary:
- Doctor visits
- Many chemotherapy drugs given through a vein, and some oral chemotherapy
- Outpatient radiation
- Diagnostic tests
- Outpatient surgery
- Durable medical equipment
- Second and third opinions before surgery
- Mental health services
- Breast prostheses after mastectomy
- Certain preventive and screening services
- Some clinical research costs
- Certain dental services directly tied to the success of a covered cancer treatment
The same medicine can be covered differently depending on how and where it’s given. The American Cancer Society notes that an IV medicine may be covered differently than a pill, and a drug given during a hospital stay differently than one you take at home. That’s why it helps to ask your care team exactly how each treatment will be delivered and billed.
Part D: prescription drugs
Part D covers most prescription drugs and some chemotherapy drugs, including oral chemo, anti-nausea drugs and pain medication used during treatment. If Part B doesn’t cover a cancer drug and you have a drug plan, your plan may cover it. Medicare advises checking that each drug is on your plan’s formulary and noting its tier, because the tier affects what you pay. You can read more in our guide to how Part D works, including costs and formularies.
What you may still pay with Original Medicare
Covered doesn’t mean free. For chemotherapy in a doctor’s office, freestanding clinic or hospital outpatient department, you typically pay 20% of the Medicare-approved amount after meeting the Part B deductible. In a hospital outpatient setting, your copayment for a single service won’t be more than the inpatient deductible amount.
Radiation follows the same pattern. As an inpatient you pay the Part A deductible and any coinsurance. As an outpatient, or at a freestanding clinic, you pay 20% of the approved amount after the Part B deductible.
The bigger point for a long course of treatment is the ceiling. Medicare & You 2027 explains that Original Medicare has no yearly limit on what you pay out of pocket for Part B services unless you have supplemental coverage such as Medigap or other insurance. Months of infusions at 20% each can add up. For a closer look at the numbers, see our overview of Medicare costs in 2026: premiums, deductibles and caps.
The Part D cap on drug costs
Part D now has a yearly out-of-pocket limit on covered prescriptions. For 2026 it is $2,100. That helps people on costly oral cancer drugs. The same report explains what the cap does not do:
- It doesn’t cap your monthly Part D premium.
- It doesn’t cover drugs your plan’s formulary excludes.
- It doesn’t apply to drugs given in a doctor’s office or infusion suite. Those bill under Part B, where the 20% coinsurance still applies unless you have Medigap or a Medicare Advantage out-of-pocket maximum.
So a pill and an infusion can follow different cost rules even when both treat the same cancer. Check the current year’s figure on Medicare.gov, because Part D amounts change from year to year.
Cancer coverage under Medicare Advantage
Medicare Advantage (Part C) plans are sold by private insurers. They must cover all medically necessary services Original Medicare covers and may add extras such as some vision, hearing and dental. They may also require you to use network providers, get referrals to see specialists, or obtain prior authorization for certain services. In most cases, Original Medicare doesn’t require prior authorization.
For cancer care, the rules matter more than the extras. The American Cancer Society says Advantage plans often have more rules for cancer care than Original Medicare, including referrals, approvals before certain treatments and in-network providers to keep costs lower. Medicare’s publication adds that services may cost more if your provider doesn’t participate in your plan, so ask whether a provider accepts your plan when you book.
Provider access is worth looking at closely. A JAMA Network Open study, reported by Healthcare Brew, looked at 800,000 Medicare Advantage beneficiaries from 2016 through 2019. They saw a small share of the oncologists and oncology organizations that traditional Medicare patients saw. Patients in only one-quarter of plans accessed a National Cancer Institute-designated comprehensive cancer center. Distance, appointment availability and prior authorization can all limit which in-network doctors are realistically open to you.
The lesson isn’t that one path is right for everyone. It’s that the doctor, hospital and cancer center you want should be named and checked before you choose a plan. If you’re weighing the two routes, our comparison of Medicare Advantage and Medicare Supplement explains the trade-offs in plain terms. Our page on Medicare Advantage guidance covers how plans are structured.
Cost comparison at a glance
| Situation | Original Medicare alone | Original Medicare with Medigap | Medicare Advantage |
|---|---|---|---|
| Outpatient chemo or radiation | 20% of approved amount after Part B deductible | Supplement plans are designed to help with that 20% | Plan’s own copays or coinsurance |
| Yearly out-of-pocket limit | None | Depends on the supplement | Plan has an out-of-pocket maximum |
| Choosing doctors | Any provider that accepts Medicare | Any provider that accepts Medicare | Network rules, referrals possible |
| Prior authorization | In most cases not required | In most cases not required | Often required for some services |
| Drug coverage | Add a Part D plan | Add a Part D plan | Often included, check formulary |
The Medigap and Advantage entries reflect how these plans are generally designed. Exact benefits vary by plan, so read the plan documents for the year you’re enrolling. Our guide to what Medicare Advantage plans cost can help you read those documents.
What Medicare doesn’t cover
Medicare’s cancer publication says it doesn’t cover room and board in assisted living, adult day care, long-term nursing home care, medical food or nutritional supplements (other than enteral nutrition equipment), or help with bathing and eating that doesn’t require skilled care. The American Cancer Society adds transportation to treatment, lodging during treatment and non-medical help at home.
These costs often catch families off guard, especially when treatment is far from home. Our guide to nursing home coverage and Medicare explains what pays and what doesn’t for longer stays.
Practical help matters here too. If family members live in different places, it helps to settle early who handles rides, appointments, meals and paperwork. A family meeting plan for long-distance caregiving can help divide those tasks before treatment starts.
Where cancer insurance fits
Some people look at a separate cancer insurance policy to help with costs Medicare leaves open, such as deductibles, copays, travel and lodging. These policies typically pay cash for covered costs, and what they cover varies by policy. They are separate from Medicare. If you’re considering one, an agent can help you compare it with a Medigap plan or the out-of-pocket maximum on an Advantage plan, so you see what each would do for you.
How to check your own coverage before treatment
- List the treatments. Ask your oncologist’s office for the drug names, whether each is given by IV, injection or pill, and where it will be given.
- Confirm each drug. Look it up in your plan’s formulary and note its tier. Read your plan materials or call the plan. If you’re shopping, use Medicare’s Plan Compare tool.
- Confirm your providers. Ask each office whether it accepts your specific plan, not just “Medicare.”
- Ask about approvals. Find out whether the plan needs prior authorization or referrals for scans, infusions or specialist visits, and who submits them.
- Add up the exposure. Estimate 20% coinsurance, Part D tier costs and your plan’s out-of-pocket limit, if it has one.
- Plan for what’s outside Medicare. Think about travel, lodging and help at home.
If your plan or a provider denies something, you have the right to appeal. Your plan’s materials explain how, and the care team’s billing office can often help.
Choosing or changing a plan when you have a cancer diagnosis
Plan decisions have deadlines, and some changes are only allowed during certain windows. Medicare’s open enrollment period runs each fall, and your plan sends yearly notices about changes to costs, formularies and networks. When one of those notices arrives, review it against your treatment list, not just your premium.
For people on expensive drugs, the formulary and the Part D cap matter most. For people seeing a specific specialist or cancer center, the network matters most. For people who want predictable bills across infusions, scans and hospital visits, the out-of-pocket structure matters most. Naming your own top priority makes the choice much easier. Our Part D prescription review is built around the drug-list side of that question.
How Almond Insurance can help
We’re a local Medicare agency in Rockford, Illinois, serving Northern Illinois and Southern Wisconsin. We compare Medicare Advantage, Medicare Supplement and Part D plans, and we do annual coverage reviews in plain language. We can’t tell you what a specific treatment will cost, and your care team and plan are the final word on that. What we can do is sit down with you or your caregiver, list your doctors and drugs, and show you how the plan options handle them.
We are paid by the insurance carriers when someone enrolls, so you don’t pay us directly for the guidance, and you don’t owe anything if you’re only gathering information. Start with our plan comparison help, or see all of our services.
FAQ
Does Medicare cover chemotherapy?
Yes. Part B covers many chemotherapy drugs given through a vein and some oral chemotherapy, and Part D covers oral chemo drugs. After the Part B deductible, you typically pay 20% of the Medicare-approved amount for chemo in a doctor’s office, clinic or hospital outpatient setting.
Does Medicare cover stage 4 cancer?
Medicare doesn’t limit coverage by cancer stage. It covers medically necessary services, including hospital stays, chemotherapy, radiation and hospice care. What you pay still depends on the setting and your plan type.
Is there a limit on what I pay out of pocket?
Not with Original Medicare alone for Part B services, unless you add a supplement such as Medigap. Medicare Advantage plans have their own out-of-pocket maximums, and Part D has a yearly cap on covered drugs, which is $2,100 for 2026.
Do I need cancer insurance if I have Medicare?
Not everyone does. Medicare covers many cancer services but not every cost, such as transportation and lodging. A cancer policy, a Medigap plan or an Advantage plan’s out-of-pocket maximum each address different gaps, so compare them against your own situation with an agent.
Sources
- Medicare Coverage of Cancer Treatment Services (Medicare.gov)
- Does Medicare Pay for Cancer Treatment? (American Cancer Society)
- Chemotherapy Medical Coverage (Medicare.gov)
- Radiation Therapy Coverage (Medicare.gov)
- Medicare & You 2027 (Medicare.gov)
- Compare Original Medicare & Medicare Advantage (Medicare.gov)
- Study on cancer patients on Medicare Advantage (Healthcare Brew)
- Medicare’s new $2,100 drug cap (24/7 Wall St.)